the two displace an identical volume of water. SO, the buoyant force is the same.
The lead-filled one probably weighs more than the displaced water, so it will still sink. The air-filled (styrofoam is mostly air) weighs less than the water, so it will float.
In a sporting goods store you see what appears to be two identical life preservers of the same size. One is filled with Styrofoam and the other one is filled with lead pellets.
If you submerge these life preservers in the water, upon which is the buoyant force greater? Upon which is the buoyant force ineffective? Why are your answers different?
1 answer